They are not mules. They are hybrids. Frowned upon by those who appreciate pure bloodlines, and are against creating new mutations. Mainly because the lines are muddied and color combinations not as striking on the norm. However, it's happened in natural as well as controlled environments for many years. Nobody has proven that these combinations are not able to produce their own offspring. Masked and Fischers have been put together by many.

What do you plan to do with the babies? Will you continue to allow them to colonize and breed with the rest?